haha, this is funny 
he will stop after it gets boring after some time, if you dont want to wait this long go find a warbanner, enable it, get an active holy justice and kill him
gamemechanics solve this
(although the bards acoustic barrier is still a funny thing that does not work 100% like intended there i guess 

 )
(guess your picture will be removed because they dont like to point out players or something, idk and idc)